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Interbank borrowings (Details 1) - CLP ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	$ 2,519,818	$ 1,788,626
Loans From Domestic Financial Institutions [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	286,603
Loans From Domestic Financial Institutions [Member] \| Due Within 1 Year [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	158,855
Loans From Domestic Financial Institutions [Member] \| Due After 1 Year But Within 2 Years [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	117,344
Loans From Domestic Financial Institutions [Member] \| Due After 2 Years But Within 3 years [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	8,167
Loans From Domestic Financial Institutions [Member] \| Due After 3 Years But Within 4 Years [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings	2,237
Loans From Domestic Financial Institutions [Member] \| Due After 5 Years [Member]
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]
Interbank borrowings